Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2013	Aug. 31, 2012
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 982	$ 851
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	40,000	40,000
Common stock, shares issued	27,056	27,056
Treasury stock, shares	10,759	9,365